886222db75
unfunctional. Wiring the user buffer has only been done explicitly since r101422. Mark the kern.disks sysctl as MPSAFE since it is and it seems to have been mis-using the NOLOCK flag. Partially break the KPI (but not the KBI) for the sysctl_req 'lock' field since this member should be private and the "REQ_LOCKED" state seems meaningless now.